When the wavelength decreases, the frequency: A. INCREASES
B. DECREASES
C. REMAINS THE SAME
D. STOPS

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.

that would be because of both gravity and friction. so     c

i need with 1.3.2 investigate cycling o2 and co2 apex

we need to see it